sensor

Abstract

A sensor comprises a circuit board assembly, the circuit board assembly comprising a circuit board and a pressure detection assembly; the sensor has a first cavity, and the circuit board is at least partially located in the first cavity. A connecting terminal comprises a connecting portion, a first end portion and a second end portion, the first end portion and the second end portion are connected with the connecting portion respectively, the connecting portion is electrically connected with the circuit board, and the connecting portion is at least partially located in the first cavity. The first end portion is at least partially embedded in the shell, and the first end portion is at least partially fixedly connected with the shell, and the first end portion is used for connecting with an external cable. The second end portion is at least partially embedded in the shell, and the second end portion is at least partially fixedly connected with the shell. A plane perpendicular to the height direction of the sensor is defined as a horizontal plane, and the extension direction of the second end portion at least partially intersects with the horizontal plane. Relative to the first end portion used for connecting with the external cable, the second end portion is less directly affected by external force, and the application can improve the connection firmness of the connecting terminal and the shell.

Description

Technical Field

[0001] This application relates to the field of fluid detection, specifically to a sensor. Background Technology

[0002] In related technologies, the sensor includes a circuit board assembly, connecting terminals, and a housing. The circuit board assembly includes interconnected circuit boards and a pressure detection component. In these technologies, the connecting terminal consists of a connecting portion and a first end. The connecting portion is connected to the first end and electrically connected to the circuit board. The first end is at least partially embedded within the housing. The fixed connection between the connecting terminal and the housing is primarily achieved through the first end. The first end is also used to connect to an external cable to output a pressure detection signal. During connection or disconnection with the external cable, the first end is subjected to force and is prone to loosening or even detachment relative to the housing, thereby affecting the connection between the connecting portion and the circuit board.

[0003] Therefore, it is necessary to improve the structure of the sensor connection terminal to enhance the connection strength between the connection terminal and the housing. Summary of the Invention

[0004] To address the aforementioned issues, this application provides a sensor in which the connection terminal is securely connected to the housing.

[0005] The sensor provided in this application includes a circuit board assembly, connecting terminals, and a housing. The circuit board assembly includes a circuit board and a pressure detection component, and the circuit board is connected to the pressure detection component. The sensor has a first cavity, and the circuit board assembly is at least partially located in the first cavity.

[0006] The connection terminal includes a connection portion, a first end, and a second end. The first end and the second end are respectively connected to the connection portion. The second end is at least partially spaced from the first end. The connection portion is at least partially located in the first cavity. The connection portion is electrically connected to the circuit board. The first end is at least partially embedded in the housing. The first end is at least partially fixedly connected to the housing. The first end is used to connect to an external cable.

[0007] The second end is at least partially embedded within the housing, and the second end is at least partially fixedly connected to the housing; a plane perpendicular to the height direction of the connecting terminal is defined as a horizontal plane, and the extension direction of at least part of the second end intersects the horizontal plane.

[0008] In this application, the connecting terminal includes a second end, which is at least partially embedded within the housing and at least partially fixedly connected to the housing. A gap exists between the second end and at least partially the first end. A plane perpendicular to the height direction of the sensor is defined as a horizontal plane, and the extension direction of at least partially of the second end intersects this horizontal plane. Compared to the first end used for connecting to external cables, the second end is less directly affected by external forces. This application achieves a fixed connection between the connecting terminal and the housing not only by being at least partially embedded in the first end of the housing but also by being at least partially embedded in the second end of the housing, thereby improving the connection strength between the connecting terminal and the housing. Attached Figure Description

[0009] Figure 1 This is a schematic diagram of a sensor provided in one embodiment of this application;

[0010] Figure 2 This is a cross-sectional schematic diagram of a sensor provided in one embodiment of this application;

[0011] Figure 3 This is an exploded view of a sensor provided in one embodiment of this application;

[0012] Figure 4 This is a perspective view of the connector of a sensor provided in one embodiment of this application;

[0013] Figure 5 This is an exploded view of the connector of a sensor provided in one embodiment of this application;

[0014] Figure 6 This is a partial cross-sectional schematic diagram of the housing provided in one embodiment of this application;

[0015] Figure 7 This is a perspective view of a connection terminal provided in one embodiment of this application;

[0016] Figure 8 This is a perspective view of the connection terminal provided in one embodiment of this application from another angle;

[0017] Figure 9 This is a perspective view of the mounting section provided in one embodiment of this application;

[0018] Figure 10 This is a perspective view of the mounting section provided in one embodiment of this application from another angle;

[0019] Figure 11 This is a cross-sectional schematic diagram of the mounting section provided in one embodiment of this application;

[0020] Figure 12 yes Figure 11 An enlarged schematic diagram of part A in the middle;

[0021] Figure 13 This is a cross-sectional view of the mounting section provided in one embodiment of this application from another angle;

[0022] Figure 14 This is a perspective view of a pressure detection component provided in one embodiment of this application;

[0023] Figure 15 This is a perspective view of a pressure detection component provided in one embodiment of this application from another angle. Detailed Implementation

[0024] To better understand the technical solution of this application, the embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0025] It should be understood that the described embodiments are merely some, not all, of the embodiments in this application. All other embodiments obtained by those skilled in the art based on the embodiments in this application without inventive effort are within the scope of protection of this application.

[0026] Sensor 100 includes a circuit board assembly 1, connection terminals 2, and a housing 3, for example... Figures 1-3 As shown. The housing 3 has a first cavity 1001, which is isolated from the external fluid of the sensor. The circuit board assembly 1 is at least partially located in the first cavity 1001. The circuit board assembly 1 includes a circuit board 6 and a pressure detection assembly 4, which is electrically connected to the circuit board 6. A connection terminal 2 is fixedly connected to the housing 3, electrically connected to the circuit board 6, and capable of being plugged into an external connector to output a pressure signal.

[0027] In related technologies, the connecting terminal 2 consists of a connecting portion 21 and a first end portion 22. The first end portion 22 extends from the connecting portion 21 along the height direction of the sensor, and its bottom end is connected to the connecting portion 21. The connecting portion 21 extends horizontally, and the connecting terminal 2 is generally L-shaped; or, the connecting terminal 2 is generally I-shaped. Along the height direction of the sensor, the first end portion 22 is farther away from the circuit board 6 relative to the connecting portion 21. A portion of the first end portion 22 is embedded in the housing 3 and fixedly connected to the housing 3, while a portion of the first end portion 22 is exposed to the outside of the sensor 100. The connecting portion 21 is electrically connected to the circuit board assembly 1 in the first cavity 1001 of the housing 3. The fixed connection between the connecting terminal 2 and the housing 3 is mainly achieved through the portion of the first end portion 22 embedded in the housing. The first end portion 22 also needs to be plugged into an external cable to output the sensor signal. The first end portion 22 is subjected to force during the plugging or unplugging process with the external cable, which can easily affect the connection strength between the connecting terminal 2 and the housing 3. For example, if the connecting terminal 2 is mistakenly connected to the external cable during the insertion process, it needs to be unplugged and re-inserted. In order to separate the connecting terminal 2 from the external cable, the first end 22 may be subjected to a large external force, causing the connecting terminal 2 to loosen in the housing 3, affecting the electrical connection between the connecting terminal 2 and the circuit board 6.

[0028] Therefore, a first aspect of this application provides a sensor 100, comprising a circuit board assembly 1, a connection terminal 2, and a housing 3. The circuit board assembly 1 includes a circuit board 6 and a pressure detection component 4, with the circuit board 6 connected to the pressure detection component 4. The sensor 100 has a first cavity 1001, with the circuit board assembly 1 at least partially exposed and located within the first cavity 1001. The connection terminal 2 includes a connection portion 21, a first end 22, and a second end 23, which are respectively connected to the connection portion 21. The first end 22 and the second end 23 extend from the connection portion 21 into the interior of the housing 3, and are both connected to the connection portion 21. The connection portion 21 is electrically connected to the circuit board 6, with at least a portion exposed and located within the first cavity 1001. The first end 22 is at least partially embedded within the housing 3 and is at least partially fixedly connected to the housing 3, and is used for connection to an external cable. The second end 23 is at least partially embedded within the housing 3, and is at least partially fixedly connected to the housing 3. There is a gap between the second end 23 and the first end 22. The plane perpendicular to the height direction H of the sensor is defined as the horizontal plane, and the extension directions of at least a portion of the first end 22 and at least a portion of the second end 23 both intersect the horizontal plane.

[0029] In this application, the connecting terminal 2 includes a second end 23, which is at least partially embedded within the housing 3 and at least partially fixedly connected to the housing 3. There is a gap between the second end 23 and the first end 22. A plane perpendicular to the height direction H of the sensor is defined as a horizontal plane, and the extension direction of at least a portion of the second end 23 intersects the horizontal plane. Compared to the first end 22 used for connecting to external cables, the second end 23 is less directly affected by external forces. This application achieves a fixed connection between the connecting terminal 2 and the housing 3 not only by being at least partially embedded in the first end 22 of the housing but also by being at least partially embedded in the second end 23 of the housing, thereby improving the connection strength between the connecting terminal 2 and the housing 3.

[0030] In some embodiments, there is a gap between the connection point of the connecting portion 21 and the first end portion 22 and the connection point of the connecting portion 21 and the second end portion 23, and the connecting portion 21 is at least partially located between the first end portion 22 and the second end portion 23; the extending direction of the first end portion 22 and the extending direction of the second end portion 23 are both the height direction H of the sensor. For example, along the height direction H of the sensor, both the first end portion 22 and the second end portion 23 extend from the connecting portion 21 in a direction away from the circuit board 6, for example... Figure 2 As shown. Alternatively, in some other embodiments, along the height direction H of the sensor, the first end portion 22 extends from the connector 21 in a direction away from the circuit board 6, and the second end portion 23 extends from the connector 21 in a direction closer to the circuit board 6. Along the height direction of the sensor, at least a portion of the first end portion 22 and at least a portion of the second end portion 23 are both away from the circuit board 6 relative to the connector 21.

[0031] In some embodiments, the sensor 100 has a first cavity 1001 and a second cavity 1002, with a housing located around the periphery of the first cavity 1001 and the second cavity 1002. The first cavity 1001 is isolated from the outside of the sensor; the second cavity 1002 communicates with the outside of the sensor, and a first end 22 is at least partially located in the second cavity 1002. The housing 3 includes a positioning portion 31, with at least a portion of the first end 22 and at least a portion of the second end 23 embedded in the positioning portion 31. The positioning portion 31 includes a first surface 311, located around the periphery of the first cavity 1001, and at least a portion of the first surface 311 is exposed in the first cavity 1001. The housing is at least partially injection molded with a connecting terminal 2 as an insert. The connecting portion 21 includes a connecting surface 211, which is electrically connected to the circuit board 6. For example, combined with Figure 2 and Figure 4As shown, the sensor includes a spring contact 9, which abuts against the circuit board 6 and also against the connecting surface 211. Both the circuit board 6 and the connecting surface 211 are electrically connected to the spring contact 9. The connecting terminal 2 is electrically connected to the circuit board 6 via the spring contact 9. The connecting surface 211 at least partially protrudes from the first surface 311. The connecting terminal 2 achieves electrical connection with the circuit board 6 through the connecting surface 211. During insert injection molding, if the connecting surface 211 does not protrude from the first surface 311, the injection molding material may easily cover the connecting surface 211, affecting the electrical connection between the connecting surface 211 and the circuit board 6.

[0032] In some embodiments, a portion of the connecting part 21 is embedded within the housing 3, and a portion of the connecting part 21 is fixedly connected to the housing 3. The connecting surface 211 includes a first connecting surface 212 and a second connecting surface 213. Along the height direction of the sensor, the first connecting surface 212 and the second connecting surface 213 are located on opposite sides of the connecting part 21, and the first connecting surface 212 is connected to the circuit board 6. The positioning part 31 has a receiving groove 313, which is recessed from the first surface 311 into the interior of the positioning part 31. The second connecting surface 213 is located in the receiving groove 313, and the first connecting surface 212 is located outside the receiving groove 313. That is, the first connecting surface 212 protrudes from the first surface 311, and the connecting terminal 2 is also fixedly connected to the housing 3 through a portion of the connecting part 21 embedded within the housing. In some embodiments, both the first connecting surface 212 and the second connecting surface 213 are planes perpendicular to the height direction H of the sensor.

[0033] In some embodiments, the housing 3 has a second cavity 1002 that communicates with the outside of the sensor, and the first end portion 22 is at least partially located in the second cavity 1002. The positioning portion 31 includes a second surface 312 located around the second cavity 1002, and at least partially exposed to the second cavity 1002. The positioning portion 31 has a positioning groove 314 formed by recessing from the second surface 312 into the interior of the positioning portion 31, communicating with the second cavity 1002, and the second end portion 23 is at least partially located in the positioning groove 314. In some embodiments, the connecting terminal 2 and the housing 3 are injection molded using an insert, i.e., the connecting terminal 2 is used as the insert injection molded housing. The positioning groove 314 facilitates the contact between the positioning structure of the mold and the second end portion 23 during the insert injection molding process; for example, a portion of the positioning structure contacts the second end portion 23, and a portion of the positioning structure contacts the connecting portion 21, thereby achieving the positioning of the connecting terminal 2 and reducing the displacement and deflection of the connecting terminal 2 during the injection molding process.

[0034] Specifically, for example Figure 2 and Figure 6As shown, along the height direction H of the sensor, the first surface 311 and the second surface 312 are located on both sides of the positioning part 31. The extension direction of the first end 22 and the extension direction of the second end 23 are the same, and both the extension directions of the first end 22 and the second end 23 are parallel to the height direction H of the sensor. The first end 22 has a first end 223, and the second end 23 has a second end 233. The first end 223 is located in the second cavity 1002, and the second end 233 is located in the positioning groove 314. That is, the first end 223 is farther away from the circuit board 6 relative to the second end 233, and the second end 233 is located in the positioning groove 314, which can reduce the interference of the second end 23 during the process of the first end 22 being connected to the external cable.

[0035] In some implementations, for example Figure 7 and Figure 8 As shown, the first end portion 22 includes a first body portion 221 and a first end portion 222. The first body portion 221 is connected to the first end portion 222 and is connected to the connecting portion 21. The first end portion 222 includes a first end portion 223. The first body portion 221 is at least partially embedded in the positioning portion 31 of the housing, and the first end portion 222 is at least partially located in the second cavity 1002. The second end portion 23 includes a second body portion 231 and a second end portion 232. The second body portion 231 is connected to the second end portion 232 and is connected to the connecting portion 21. The second end portion 232 includes a second end portion 233. The second body portion 231 is at least partially embedded in the positioning portion 31 of the housing, and the second end portion 232 is at least partially located in the positioning groove 314. That is, along the height direction of the sensor, at least part of the first end 22 and at least part of the second end 23 are located on the same side of the connecting portion 21, and the first end 223 and the second end 233 are located on the same side of the connecting portion 21; the first end 223 is farther away from the connecting portion 21 relative to the second end 233. In other embodiments, the second end 23 may also be integrally embedded in the positioning portion 31 of the housing 3.

[0036] In some embodiments, along the height direction H of the sensor, the first end portion 222 extends outward from the first body portion 221, and the first body portion 221 protrudes from the first end portion 222. Specifically, for example... Figure 7 and Figure 8As shown, the first end portion 222 has a first side surface 2221 and a second side surface 2222, and the first body portion 221 has a third side surface 2211 and a fourth side surface 2212. Along the width direction W of the connecting terminal 2, the first side surface 2221 and the second side surface 2222 are located on both sides of the first end portion 222, and the third side surface 2211 and the fourth side surface 2212 are located on both sides of the first body portion 221. Along the width direction of the connecting terminal 2, the third side surface 2211 is farther away from the second side surface 2222 relative to the first side surface 2221, and the fourth side surface 2212 is farther away from the first side surface 2221 relative to the second side surface 2222. Alternatively, the surface perpendicular to the height direction of the connecting terminal 2 can be defined as the projection surface. The orthographic projection of the first end portion 222 onto the projection surface is the first projection, and the orthographic projection of the first body portion 221 onto the projection surface is the second projection. The first projection is located within the outer contour of the second projection. In some embodiments, the first side 2221, the second side 2222, the third side 2211, and the fourth side 2212 are all planes parallel to the height direction H of the sensor. In some embodiments, the height direction of the connecting terminal 2 is parallel to the height direction H of the sensor, the width direction W and the length direction L of the connecting terminal 2 are perpendicular to the height direction H of the sensor, and the length direction L of the connecting terminal 2 is perpendicular to the width direction W.

[0037] In some embodiments, the first body portion 221 has a limiting groove 224, which is recessed from the surface of the first body portion 221 toward the interior of the first body portion 221, and the housing 3 is at least partially located in the limiting groove 224. For example Figure 7 As shown, along the width direction of the connecting terminal 2, the limiting groove 224 includes a first limiting groove 2241 and a second limiting groove 2242. The first limiting groove 2241 is recessed from a third side into the interior of the first body portion 221, and the second limiting groove 2242 is recessed from a fourth side into the interior of the first body portion 221. In some embodiments, for example... Figure 7 and Figure 8 As shown, a limiting groove 224 is provided through the first body part 221 along the length direction L of the connecting terminal 2.

[0038] In some embodiments, along the height direction H of the sensor, the second end portion 232 extends outward from the second body portion 231, and the second body portion 231 protrudes from the second end portion 232. Specifically, for example... Figure 7 and Figure 8As shown, the second end portion 232 has a fifth side surface 2321 and a sixth side surface 2322, and the second body portion 231 has a seventh side surface 2311 and an eighth side surface 2312. Along the width direction of the connecting terminal 2, the fifth side surface 2321 and the sixth side surface 2322 are located on both sides of the second end portion 233, and the seventh side surface 2311 and the eighth side surface 2312 are located on both sides of the second body portion 231. Along the width direction of the connecting terminal 2, the seventh side surface 2311 is farther away from the sixth side surface 2322 relative to the fifth side surface 2321, and the eighth side surface 2312 is farther away from the fifth side surface 2321 relative to the sixth side surface 2322. Alternatively, the surface perpendicular to the height direction of the connecting terminal 2 can be defined as the projection surface. The orthographic projection of the second end portion 232 onto the projection surface is the third projection, and the orthographic projection of the second body portion 231 onto the projection surface is the fourth projection. The third projection is located within the outer contour of the fourth projection. In some embodiments, the fifth side 2321, the sixth side 2322, the seventh side 2311, and the eighth side 2312 are all planes parallel to the sensor height direction H.

[0039] In some implementations, for example Figure 6 As shown, the positioning part 31 includes a first hole 301 and a second hole 302. The first hole 301 includes a first hole 303 and a first hole wall 304, with the first hole wall 304 located around the first hole 303. The second hole 302 includes a second hole 305 and a second hole wall 306, with the second hole wall 306 located around the second hole 305. A first body part 221 is at least partially located in the first hole 303 and is sealed to the first hole wall 304. A second end part 23 includes a second body part 231 and a second end part 232. The second body part 231 is at least partially located in the second hole 305 and is sealed to the second hole wall 306. The positioning part 31 has a positioning groove wall 315 located around the positioning groove 314 and is sealed to the second end part 23.

[0040] In some implementations, for example Figure 5 As shown, the sensor includes at least two connection terminals 2, each including a first connection terminal 201 and a second connection terminal 202. The second end 23 of the first connection terminal 201 is located away from the second connection terminal 202 relative to the first end 22 of the first connection terminal 201. Alternatively, the first end 22 is located closer to the center or central axis of the housing relative to the second end 23. Specifically, for example… Figure 5 As shown, the sensor includes three connection terminals 2, each of which includes a first end 22, a second end 23 and a connection portion 21. The first end 22 of each connection terminal 2 is closer to the middle of the housing 3 relative to its second end 23.

[0041] The pressure detection component 4 has a pressure detection channel 43, and the housing has a fluid channel 338. The fluid channel 338 is connected to the pressure detection channel 43, so that the fluid to be tested can enter the pressure detection channel 43 through the fluid channel 338. The pressure detection component 4 detects the fluid pressure in the pressure detection channel 43, for example... Figure 2 , Figure 14 and Figure 15 As shown. The pressure detection channel 43 is fluid-isolated from the first cavity 1001 to reduce the impact of the fluid on the circuit board assembly 1. In some embodiments, the circuit board assembly 1 further includes a temperature detection component 5 for detecting the fluid temperature. The temperature detection component 5 includes, for example, a thermistor 51 and at least a pair of leads 52 connected to the thermistor 51. Accordingly, the housing has a third cavity 1003, which communicates with the first cavity 1001 and is isolated from external fluid. The temperature detection component 5 is at least partially located in the third cavity 1003. For example... Figure 2 As shown, the thermistor 51 and a portion of the leads 52 are located in the third cavity 1003.

[0042] To facilitate the installation of the circuit board assembly 1, in some embodiments, the housing 3 includes a plug-in portion 32 and a mounting portion 33, with the plug-in portion 32 fixed to the mounting portion 33. Both the plug-in portion 32 and the mounting portion 33 are located on the periphery of the first cavity 1001; for example, the plug-in portion 32 and the mounting portion 33 surround and form the first cavity 1001. The plug-in portion 32 includes the positioning portion 31 described above. The plug-in portion 32 has the second cavity 1002 described above. In some embodiments, the plug-in portion 32 has an inner wall and a protrusion, the protrusion protruding from the inner wall towards the second cavity 1002. The protrusion is used to connect external cables, and its shape and size can be designed and varied according to the shape and size of the external cables. In some embodiments, the plug-in portion 32 is a single piece. In some embodiments, the plug-in portion 32 is fixedly connected to or detachably connected to the mounting portion 33.

[0043] The mounting portion 33 has a cavity, a portion of which forms a first cavity 1001 and a portion of which forms a third cavity 1003. The mounting portion 33 also has the fluid channel 338 described above. During installation, for example, the circuit board assembly 1 can be placed into the cavity first, the pressure sensing assembly 4 and the circuit board 6 can be connected to the second housing, and the pressure sensing channel 43 can be connected to the fluid channel 338. Finally, the insertion portion 32 and the mounting portion 33 can be fixed, thereby accommodating the circuit board assembly 1 within the closed cavity. For example, the pressure sensing assembly 4 and the circuit board 6 are located in the first cavity 1001, a portion of the temperature sensing assembly 5 is located in the first cavity 1001, and another portion of the temperature sensing assembly 5 is located in the third cavity 1003.

[0044] The mounting portion 33 includes a first housing portion 333 and a second housing portion 334, both of which are located at least partially on the periphery of the first cavity 1001. The pressure detection component 4 is mounted on the first housing portion 333. To facilitate the installation of the pressure detection component 4, the first housing portion 333 and the second housing portion 334 are separately configured in related technologies. Specifically, for example, the first housing portion 333 and the second housing portion 334 are respectively machined and formed, then the pressure detection component 4 is first welded to the first housing portion 333, and then the first housing portion 333 and the second housing portion 334 are welded together, and then the other parts of the circuit board assembly 1 are placed into the cavity. In the final sensor structure, the pressure detection component 4 is fixedly and sealed to the first housing portion 333. The first housing portion 333 and the second housing portion 334 are also fixedly and sealed together. Thus, in a sensor where the first housing portion 333 and the second housing portion 334 are separately configured, it is necessary not only to fix the first housing portion 333 and the second housing portion 334, but also to seal them together. If a sealed connection is not achieved between the first housing part 333 and the second housing part 334, the fluid to be measured can easily leak through the gap between them. For example, if there is a poor solder joint or detachment at the connection between the first housing part 333 and the second housing part 334, the fluid to be measured can leak into the first cavity 1001, affecting the circuit board assembly 1, or the fluid to be measured can leak into the environment, causing loss of the fluid to be measured. For example, when the sensor is used to detect relevant parameters of refrigerant, it may lead to refrigerant loss in the system; for flammable refrigerants, leakage poses a significant safety hazard. In other words, sensors with separate first housing part 333 and second housing part 334 pose a risk of leakage of the fluid to be measured during the detection process, especially when detecting high-pressure fluids.

[0045] A second aspect of this application provides a sensor including a circuit board assembly 1 and a housing 3. The circuit board assembly 1 includes a temperature detection component 5, a pressure detection component 4, and a circuit board 6. The housing 3 includes a plug-in portion 32 and a mounting portion 33. The plug-in portion 32 is used for connection with an external plug-in. The mounting portion 33 has cavities 331 and 332, and the circuit board assembly 1 is at least partially located in the cavities 331 and 332. The mounting portion 33 has a fluid channel 338 for guiding the fluid to be measured from the outside of the sensor to the pressure detection component 4. The mounting portion 33 includes a first housing portion 333 and a second housing portion 334, the second housing portion 334 being connected to the first housing portion 333. The first housing portion 333 is at least partially located on the periphery of the cavities 331 and 332, and the second housing portion 334 is at least partially located on the periphery of the cavities 331 and 332. The fluid channel 338 is disposed in the first housing portion 333. Along the height direction of the sensor, the second housing portion 334 is at least partially adjacent to the insertion portion 32 relative to the first housing portion 333, and the second housing portion 334 is fixed to the insertion portion 32. The mounting portion 33 is a single piece. The pressure detection assembly 4 is mounted on the first housing portion 333. The first housing portion 333 has a first mounting surface 335, which is at least partially located on the periphery of the cavities 331 and 332, and is at least partially exposed to the cavities 331 and 332. The pressure detection assembly 4 is connected to the first mounting surface 335.

[0046] In the sensor of this application, the housing includes a plug-in portion 32 and a mounting portion 33. The mounting portion 33 includes a first housing portion 333 and a second housing portion 334, which are connected to the first housing portion 333. The mounting portion 33 is a single piece. Compared to a design where the first housing portion 333 and the second housing portion 334 are separate components, this application can reduce the risk of leakage of the fluid to be measured from the connection between the first housing portion 333 and the second housing portion 334.

[0047] In some embodiments, cavities 331 and 332 include a first cavity 331 and a second cavity 332, with the first cavity 331 communicating with the second cavity 332. At least a portion of the circuit board 6 and the pressure sensing component 4 are located in the first cavity 331, and at least a portion of the temperature sensing component 5 is located in the second cavity 332. A first housing portion 333 and a second housing portion 334 are both located around the periphery of the first cavity 331, and the second cavity 332 is disposed within the first housing portion 333. The first housing portion 333 has a first mounting surface 335, which is at least partially located around the periphery of the first cavity 331 and at least partially exposed to the first cavity 331. The first mounting surface 335 has a first opening 3351, which communicates with both the first cavity 331 and the second cavity 332. This helps to reduce mutual interference between the temperature sensing component and other parts of the circuit board assembly.

[0048] In some embodiments, both the insertion portion 32 and the mounting portion 33 are located on the periphery of the first cavity 1001, for example... Figure 2 As shown, the insertion portion 32 and the mounting portion 33 enclose and form a first cavity 1001. The first cavity 331 at least partially forms the first cavity 1001, and the second cavity 332 at least partially forms the third cavity 1003. Both the first cavity 1001 and the third cavity 1003 are isolated from external fluids. Specifically, for example... Figure 2 As shown, the first housing portion 333 is located on the periphery of the first cavity 1001, and at least partially exposed to the first cavity 1001; the first mounting surface 335 is located on the periphery of the first cavity 1001, and at least partially exposed to the first cavity 1001. A portion of the insertion portion 32 is located in the first cavity 331, a portion of the space of the first cavity 331 is occupied by the insertion portion 32, and the other portion forms the first cavity 1001. A portion of the second housing portion 334 is located on the periphery of the first cavity 1001 and exposed to the first cavity 1001, and the other portion of the second housing portion 334 is fixedly connected to the insertion portion 32. For example... Figure 2 As shown, the insertion part 32 and the first housing part 333 are located on the upper and lower sides of the first cavity 1001, respectively, and a part of the second housing part 334 is located on the periphery of the first cavity 1001.

[0049] In some embodiments, the pressure detection assembly 4 has a pressure detection channel 43, and a fluid channel 338 connects the sensor to the outside and the pressure detection channel 43. The fluid channel 338 includes a fluid inlet 3382, which is located on the outer surface of the mounting portion 33, for example... Figure 11 As shown.

[0050] In some implementations, for example Figure 11 As shown, the second housing portion 334 has a second opening 339. Along the height direction of the sensor, the second opening 339 and the first mounting surface 335 are located on both sides of the first cavity 331. The first mounting surface 335 is fixedly connected to the pressure detection component 4, and the first mounting surface 335 is sealed to the pressure detection component 4. In this application, the mounting portion 33 is an integral piece, and the connection between the pressure detection component 4 and the first housing portion 333 is achieved more conveniently through the first mounting surface 335. Specifically, the pressure detection component 4 is first placed into the first cavity 331 through the second opening 339, and contacts or gap-fits with the first mounting surface 335. Then, a welding tool is inserted into the first cavity 331 from the second opening 339 to weld at the connection point between the pressure detection component 4 and the first housing portion 333. Specifically, for example... Figure 14 and Figure 15As shown, the pressure detection component 4 includes a main body 41 and a chip 42. The main body 41 has a pressure detection channel 43. The main body 41 has an inner surface 411 and an outer surface 412. The inner surface 411 is located around the pressure detection channel 43 and is at least partially exposed to the pressure detection channel 43. The outer surface 412 is at least partially exposed to the first cavity 1001. The chip 42 is mounted on the outer surface 412. The first mounting surface 335 is fixedly connected to the main body 41 and is sealed to the main body 41.

[0051] In some embodiments, the first housing portion 333 has a groove 337, which is recessed from the first mounting surface 335 into the interior of the first housing portion 333. The groove 337 includes a mounting groove 3371 and a groove wall 3372, with the groove wall 3372 located around the periphery of the mounting groove 3371. The fluid passage 338 has a fluid outlet 3381, which is located within the groove wall 3372. For example... Figure 11 and Figure 13 As shown, along the height direction of the sensor, the mounting groove 3371 is close to the first mounting surface 335 relative to the fluid channel 338. The first mounting surface 335 has a third opening 3352, and the pressure sensing component 4 is at least partially located in the mounting groove 3371 and at least partially located in the third opening 3352. It can be understood that when the pressure sensing component 4 is not connected to the first housing portion 333, the third opening 3352 connects the first cavity 331 and the mounting groove 3371, and the mounting groove 3371 communicates with the fluid channel 338.

[0052] In some embodiments, the groove 337 includes a first limiting portion 3375 disposed on the groove wall 3372, and the pressure sensing component 4 has a second limiting portion 45, with the first limiting portion 3375 engaging with the second limiting portion 45. One of the first limiting portion 3375 and the second limiting portion 45 is a protrusion, and the other is a groove, with the protrusion at least partially located within the groove. This reduces displacement of the pressure sensing component 4 relative to the groove 337 and the first housing portion 333, for example, during the connection process between the pressure sensing component 4 and the first housing portion 333. Figure 11 As shown, the first limiting part 3375 is a protrusion that protrudes from the groove wall 3372 into the mounting groove 3371. Correspondingly, the pressure detection component 4 includes a protrusion 44 that extends from the outer surface 412 of the main body part 41 in a direction away from the pressure detection channel 43. The second limiting part 45 is a groove formed by recessing from the outer surface of the protrusion 44 of the pressure detection component 4 inward. At least a portion of the protrusion is located in the groove.

[0053] In some embodiments, the protrusion 44 is at least partially located in the mounting groove 3371, at least partially contacts the groove wall 3372, is fixedly connected to the first mounting surface 335, and is sealingly connected to the first mounting surface 335. Specifically, for example... Figure 14 and Figure 15 As shown, the protrusion 44 has a first surface 441 and a second surface 442. Along the height direction of the sensor, the first surface 441 and the second surface 442 are located on both sides of the protrusion 44. The groove wall 3372 includes a side wall 3373 and a bottom wall 3374. The side wall 3373 is located on the periphery of the mounting groove 3371. Along the height direction of the sensor, the bottom wall 3374 is closer to the fluid channel 338 than the side wall 3373. The fluid outlet 3381 is located on the bottom wall 3374. The second surface 442 is located in the mounting groove 3371, and the second surface 442 is at least partially in contact with the bottom wall 3374. The first surface 441 is flush with the first mounting surface 335, and the first surface 441 is fixedly connected to the first mounting surface 335 and is sealed to the first mounting surface 335; or, the first surface 441 protrudes from the first mounting surface 335. The first housing portion 333 is connected to the protrusion 44 of the pressure detection component 4 via the first mounting surface 335. This ensures that even if the fluid to be tested in the fluid channel 338 reaches the connection between the first housing portion 333 and the pressure detection component 4, it must pass through the gap between the protrusion 44 and the groove wall 3372. In other words, the gap between the protrusion 44 and the groove wall 3372 acts as a buffer for the fluid to be tested, reducing the risk of the impact of the fluid causing the sealing connection between the first housing portion 333 and the pressure detection component 4 to fail.

[0054] In other embodiments, the first limiting portion 3375 is a groove formed by recessing from the groove wall 3372 into the interior of the first housing portion 333. The pressure detection component 4 includes a protrusion 44 extending from the outer surface 412 of the main body portion 41 in a direction away from the pressure detection channel 43. The second limiting portion 45 is a protrusion formed by protruding outward from the outer surface of the protrusion 44 of the pressure detection component 4, at least a portion of which is located in the groove. This application does not limit the specific shape and size of the first limiting portion 3375 and the second limiting portion 45, as long as they can reduce the displacement of the pressure detection component 4 relative to the first housing portion 333 and do not affect other structures of the sensor.

[0055] In some embodiments, the first mounting surface 335 is a plane, perpendicular to the height direction of the sensor. This facilitates the machining of the second cavity 332 and the mounting groove 3371, as well as the installation of the pressure detection assembly 4 onto the first housing portion 333.

[0056] In some embodiments, the first housing portion 333 includes a first portion 71 and a second portion 72. The first portion 71 includes a first mounting surface 335 and a second mounting surface 336. Along the height direction of the sensor, the first mounting surface 335 and the second mounting surface 336 are located on opposite sides of the first portion 71. The second portion 72 protrudes outward from the second mounting surface 336. A second cavity 332 penetrates both the first portion 71 and the second portion 72, and a fluid channel 338 penetrates both the first portion 71 and the second portion 72. In some cases, the size of the second portion 72 is limited, so the distance between the second cavity 332 and the fluid channel 338 in the second portion 72 is small, or in other words, the thickness of the housing wall between the first cavity 331 and the fluid channel 338 is thin. For example... Figure 2 and Figure 11 As shown, the first housing portion 333 includes a connecting wall 35 located between the second cavity 332 and the fluid channel 338. The connecting wall 35 includes a first wall surface 351 and a second wall surface 352. The first wall surface 351 is located on the periphery of the second cavity 332, and the second wall surface 352 is located on the periphery of the fluid channel 338. Both the first wall surface 351 and the second wall surface 352 are curved surfaces. The minimum distance between the first wall surface 351 and the second wall surface 352, perpendicular to the height direction of the sensor, is the thickness of the connecting wall 35. If both the second cavity 332 and the fluid channel 338 extend along the height direction H of the sensor, the second cavity 332 may interfere with the mounting groove 3371, and the temperature detection component 5 may also interfere with the pressure detection component 4. Even if the second cavity 332 does not interfere with the mounting groove 3371, the connecting wall 35 between the two housing portions 333 and the first cavity 1001 is relatively thin and has low strength, making it prone to deformation during installation. Therefore, in some embodiments, the fluid channel 338 extends along a first direction, and the second cavity 332 extends along a second direction. The first direction is parallel to the height direction H of the sensor, and the second direction intersects the height direction H of the sensor. The angle between the second direction and the height direction H of the sensor is α, where 3°≤α≤9°, for example, α is 4°, 5°, 6°, 7°, 8°, etc. Figure 2 As shown. The inclined arrangement of the second cavity 332 can reduce interference between the second cavity 332 and the mounting groove 3371 when the size of the second part 72 is limited.

[0057] In some embodiments, the second housing portion 334 extends outward from the first portion 71; the first portion 71 has an outer wall 711 and a protrusion 712, the protrusion 712 protruding outward from the outer wall 711; there is a gap between the protrusion 712 and the second housing portion 334; the mounting portion 33 has a slot 34, and along the height direction of the sensor, the protrusion 712 is located away from the second housing portion 334 relative to the slot 34, the outer wall 711, the protrusion 712 and the second housing portion 334 are all located around the slot 34. The slot 34 is used to engage with a gasket so that the housing is sealed to other components (e.g., a pipe through which the fluid to be measured flows) via the gasket. In some embodiments, at least one of the outer wall 711 and the protrusion 712 of the first portion 71 is threaded. This facilitates the threaded connection of the first portion 71 to other components.

[0058] In some embodiments, the first housing portion 333 has a third portion 73; the second portion 72 has a third mounting surface 721, which is located away from the first mounting surface 335 relative to the second mounting surface 336 along the height direction of the sensor, and the third portion 73 protrudes outward from the third mounting surface 721; the third portion 73 has a receiving hole 731, one end of which is closed, and the other end of which communicates with the second cavity 332, and the receiving hole 731 is a blind hole. The third cavity mentioned above includes the receiving hole 731 and the second cavity 332. The thermistor of the temperature detection component 5 is at least partially housed in the receiving hole 731. In some embodiments, the third mounting surface 721 is a plane, and the plane containing the third mounting surface 721 intersects the plane containing the first mounting surface 335, with the fluid channel 338 located near the intersection of the plane containing the first mounting surface 335 and the plane containing the third mounting surface 721 relative to the second cavity 332. In other words, along the height direction of the sensor, the thickness of the third part 73 on the side where the second cavity 332 is located is greater than its thickness on the side where the fluid channel 338 is located. This helps to enhance the connection strength between the third part 73 and the second part 72.

[0059] In some embodiments, the mounting part is made of metal, such as stainless steel formed by casting or machining. Of course, the mounting part 33 can also be made of other materials, such as copper, aluminum, or alloys. Metals have a high thermal conductivity, which facilitates the conduction of fluid temperature to the temperature sensing component 5, improving the accuracy and sensitivity of the temperature sensing component 5.

[0060] In some embodiments, the pressure detection component 4 is welded to the first housing portion 333, for example by electronic spot welding, laser welding, or other methods.

[0061] In related technologies, the insertion part 32 and the mounting part 33 need to be sealed together to reduce the influence of external impurities on the circuit board assembly 1. Furthermore, to limit the displacement of the circuit board 6, the insertion part 32 and the mounting part 33 cooperate to clamp the circuit board 6. Because the insertion part 32 and the mounting part 33 are relatively rigid, direct contact between them could easily damage the circuit board 6. Therefore, not only is a sealing element required to achieve a sealed connection between the insertion part 32 and the mounting part 33, but an elastic element 8 is also needed to reduce damage to the circuit board 6 caused by direct contact between the insertion part 32 and the mounting part 33, resulting in a more complex sensor structure.

[0062] A third aspect of this application provides a sensor including a circuit board assembly 1 and a housing 3. The circuit board assembly 1 includes a circuit board 6. The housing has a first cavity 1001, which is isolated from the outside of the sensor. The circuit board 6 is at least partially located in the first cavity 1001. The housing includes a plug-in portion 32 and a mounting portion 33. The sensor 100 includes an elastic member 8. Both the plug-in portion 32 and the mounting portion 33 are located around the first cavity 1001. The plug-in portion 32 is fixed to the mounting portion 33. The elastic member 8 is partially clamped between the plug-in portion 32 and the mounting portion 33. The plug-in portion 32 and the mounting portion 33 are sealed together by the elastic member 8. Along the height direction of the sensor, at least a portion of the elastic member 8 and at least a portion of the mounting portion 33 are located on opposite sides of the circuit board 6. The elastic member 8 abuts against the circuit board 6, and at least a portion of the mounting portion 33 is tightly fitted or abuts against the circuit board 6.

[0063] In this application, the elastic member 8 is partially sandwiched between the insertion portion 32 and the mounting portion 33, and at least a portion of the elastic member 8 and at least a portion of the mounting portion 33 are located on opposite sides of the circuit board 6. The elastic member 8 abuts against the circuit board 6, and at least a portion of the mounting portion 33 is tightly fitted to the circuit board 6. The elastic member 8 can not only be used for a sealing connection between the insertion portion 32 and the mounting portion 33, but also cooperate with the mounting portion 33 and the insertion portion 32 to restrict the displacement of the circuit board 6. The abutment between the elastic member 8 and the circuit board 6 reduces the risk of damage to the circuit board 6 compared to direct abutment between the insertion portion 32 and the circuit board 6. Therefore, this application simplifies the structure of the sensor.

[0064] In some embodiments, the mounting portion 33 includes a conductive metal and is a single piece, with the circuit board 6 electrically connected to the mounting portion 33. The circuit board assembly 1 may generate static electricity in some cases, therefore grounding is also necessary. Related technologies employ structural members to apply force to the circuit board 6, causing it to abut against the conductive metal mounting portion 33, and achieving electrical connection at the point of contact. This allows the static electricity generated by the circuit board assembly 1 to be discharged through the mounting portion 33 to ground. Therefore, the elastic member 8 of this application not only seals the connection between the insertion portion 32 and the mounting portion 33 and buffers the force on the circuit board 6, but also integrates the functions of the aforementioned structural members.

[0065] In some embodiments, the circuit board 6 has a first mating surface 61 and a second mating surface 62, which are located on opposite sides of the circuit board 6 along the height direction of the sensor. An elastic member 8 abuts against the first mating surface 61, and the mounting portion 33 abuts against the second mating surface 62. Compared to a solution where the insertion portion 32 abuts against the circuit board 6, the insertion portion 32 is tightly fitted to the circuit board 6 via the elastic member 8, reducing damage to the circuit board 6 caused by the insertion portion 32. Of course, in some embodiments, an elastic member 8 or a buffer can be provided between the circuit board 6 and the mounting portion 33 to reduce damage to the circuit board 6 caused by the mounting portion 33 abutting against it.

[0066] In some embodiments, the circuit board 6 has a through hole 64 that extends through the circuit board 6, passing through the first mating surface 61 and the second mating surface 62, with the pressure sensing component 4 at least partially located within the through hole. This helps to reduce the height of the sensor.

[0067] In some implementations, for example Figure 11 and Figure 12 As shown, the mounting portion 33 includes a wall portion 90, a first abutting portion 91, and a second abutting portion 92. The mounting portion 33 has a first cavity 331, which at least partially forms a first cavity 1001. The first abutting portion 91 protrudes from the wall portion 90 into the first cavity 331, and the second abutting portion 92 protrudes from the first abutting portion 91 into the first cavity 331. The first abutting portion 91 has a first abutting surface 911, and the second abutting portion 92 has a second abutting surface 921. Along the height direction of the sensor, the first abutting surface 911 is closer to the insertion portion 32 than the second abutting surface 921. The first abutting surface 911 abuts against the elastic member 8, and the second abutting surface 921 abuts against the second mating surface 62 of the circuit board 6. Thus, the first abutting portion 91 of the mounting portion 33 cooperates with the insertion portion 32 to clamp the elastic member 8 between them, and the second abutting portion 92 of the mounting portion 33 cooperates with the elastic member 8 to restrict the displacement of the circuit board 6 along the height direction of the sensor.

[0068] In some embodiments, along the height direction of the sensor, the insertion portion 32 and the first abutment portion 91 are located on opposite sides of the elastic member 8, and at least a portion of the circuit board 6 is located on the same side of the elastic member 8 as the first abutment portion 91. In some embodiments, the elastic member 8 is a circular O-ring, and along the height direction of the sensor, the first mating surface 61 is close to the insertion portion 32 relative to the first abutment surface 911. In some embodiments, the elastic member 8 is annular or U-shaped, the circuit board 6 is circular or square, and the inner edge of the elastic member 8 abuts against the outer edge of the circuit board 6.

[0069] In some embodiments, the first contact surface 911 and the second contact surface 921 are both planes, and both the first contact surface 911 and the second contact surface 921 are perpendicular to the height direction H of the sensor.

[0070] In some embodiments, the first abutting portion 91 has a limiting surface 912 connected to the first abutting surface 911 and connected to the second abutting surface 921; the mounting portion 33 has a first protrusion 913 protruding from the limiting surface 912 into the first cavity 331, for example... Figure 9 and Figure 10 As shown. The circuit board 6 has a first recess 63, which is recessed from the peripheral side surface of the circuit board 6 toward the interior of the circuit board 6, and a first protrusion 913 is at least partially located within the first recess 63. This restricts the rotation of the circuit board 6 relative to the mounting portion 33. Of course, in other embodiments, the circuit board 6 has a first protrusion 913, which protrudes outward from the peripheral side surface of the circuit board 6, and the mounting portion 33 has a first recess 63, which is recessed from the limiting surface 912 toward the interior of the mounting portion 33, and the first protrusion 913 is at least partially located within the first recess 63. In some embodiments, the limiting surface 912 has a clearance fit with the side surface of the circuit board 6, and the limiting surface 912 is parallel to the height direction of the sensor. Both the first mating surface 61 and the second mating surface 62 are connected to the peripheral side surface of the circuit board 6.

[0071] In some embodiments, the insertion portion 32 is at least partially located in the first cavity 331. The mounting portion 33 includes a third abutment portion 93 and an extension portion 94. The third abutment portion 93 protrudes from the wall portion 90 into the first cavity 331, and the extension portion 94 is connected to the wall portion 90 and located on the periphery of the first cavity 331. Along the height direction of the sensor, there is a gap between the third abutment portion 93 and the extension portion 94. The insertion portion 32 is at least partially located between the third abutment portion 93 and the extension portion 94. The third abutment portion 93 and the extension portion 94 abut against the insertion portion 32, respectively. In some embodiments, the extension portion 94 is located on the periphery of the second opening 339. In some embodiments, the first abutment portion 91 protrudes from the third abutment portion 93 into the first cavity 331, and the second abutment portion 92 protrudes from the first abutment portion 91 into the first cavity 331.

[0072] In some embodiments, the third abutment portion 93 has a third abutment surface 931, and along the height direction of the sensor, the elastic member 8 is at least partially away from the insertion portion 32 relative to the third abutment surface 931, and the third abutment surface 931 is close to the insertion portion 32 relative to the first abutment surface 911.

[0073] In some embodiments, the second housing portion 334 includes a wall portion 90, a first abutting portion 91, a second abutting portion 92, a third abutting portion 93, and an extension portion 94. Along the height direction of the sensor, a first distance exists between the second abutting surface 921 and the first mounting surface 335, a second distance exists between the first abutting surface 911 and the first mounting surface 335, a third distance exists between the third abutting surface 931 and the first mounting surface 335, and a fourth distance exists between the extension portion 94 and the first mounting surface 335. The first distance is smaller than the second distance, the second distance is smaller than the third distance, and the third distance is smaller than the fourth distance. The second abutting portion 92 is connected to the first housing portion 333.

[0074] In some embodiments, the insertion portion 32 has a pressing surface 321 that abuts against the elastic member 8. Along the height direction of the sensor, the pressing surface 321 and the first abutting surface 911 are located on opposite sides of the elastic member 8. The insertion portion 32 has an inner cavity 322, which is recessed from the pressing surface 321 into the interior of the insertion portion 32. The spring piece 9 is at least partially located within the inner cavity 322, and the connecting portion 21 is at least partially located within the inner cavity 322.

[0075] In some embodiments, the insertion portion 32 has an outer surface 323, which is at least partially located in the first cavity 331. The mounting portion 33 has a second protrusion 3310 that protrudes from the wall portion 90 into the first cavity 331. Along the height direction of the sensor, the second protrusion 3310 is close to the extension 94 relative to the third abutment portion 93, for example... Figure 9 and Figure 10 As shown. The insertion portion 32 has a second recess 324, which is recessed into the insertion portion 32 from its outer surface 323; or, the insertion portion 32 has a second protrusion 3310, which protrudes outward from its outer surface. The mounting portion 33 has a second recess 324, which includes a groove in the wall portion 90. The second recess 324 communicates with the first cavity 331. Along the height direction of the sensor, the second recess 324 is close to the extension portion 94 relative to the third abutment portion 93. The second protrusion 3310 is at least partially located within the second recess 324.

[0076] When assembling the sensor, first place the circuit board assembly 1 into the cavity of the mounting part 33, then place the elastic member 8 into the cavity of the mounting part 33, and finally align and assemble the plug-in part 32 with the connecting terminal 2 into the mounting part 33. The extension part 94 and the third abutment part 93 cooperate to restrict the displacement of the plug-in part 32 along the sensor height direction, realizing the crimping between the plug-in part 32 and the mounting part 33. The plug-in part 32 and the first abutment part 91 cooperate to press the elastic member 8, realizing a sealed connection between the plug-in part 32 and the mounting part 33. At the same time, the elastic member 8 and the second abutment part 92 cooperate to restrict the displacement of the circuit board 6 along the sensor height direction.

[0077] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. A sensor comprising a circuit board assembly, connecting terminals, and a housing, wherein the circuit board assembly includes a circuit board and a pressure detection component, the circuit board being connected to the pressure detection component, characterized in that: The sensor has a first cavity, and the circuit board assembly is at least partially located in the first cavity; The connection terminal includes a connection portion, a first end, and a second end. The first end and the second end are respectively connected to the connection portion. The second end is at least partially spaced from the first end. The connection portion is at least partially located in the first cavity. The connection portion is electrically connected to the circuit board. The first end is at least partially embedded in the housing. The first end is at least partially fixedly connected to the housing. The first end is used to connect to an external cable. The second end is at least partially embedded within the housing, and at least partially fixedly connected to the housing; a plane perpendicular to the height direction of the connecting terminal is defined as a horizontal plane, and the extension direction of at least part of the second end intersects the horizontal plane; The first end portion includes a first body portion and a first end portion, the first body portion being connected to the connecting portion; the first body portion protrudes from the first end portion; The first body portion has a limiting groove, which is recessed from the surface of the first body portion toward the interior of the first body portion, and the housing is at least partially located in the limiting groove.

2. The sensor as described in claim 1, characterized in that: There is a gap between the connection point between the connecting part and the first end and the connection point between the connecting part and the second end, and the connecting part is at least partially located between the first end and the second end; Along the height direction of the sensor, at least a portion of the first end and at least a portion of the second end are both away from the circuit board relative to the connection portion.

3. The sensor as described in claim 1, characterized in that: The housing includes a positioning part, in which at least a portion of the first end and at least a portion of the second end are embedded; the positioning part includes a first surface located on the periphery of the first cavity. The connecting portion includes a connecting surface, which is electrically connected to the circuit board, and the connecting surface at least partially protrudes from the first surface.

4. The sensor as described in claim 3, characterized in that: A portion of the connecting part is embedded within the housing, and the portion of the connecting part is fixedly connected to the housing; The connecting surface includes a first connecting surface and a second connecting surface. Along the height direction of the sensor, the first connecting surface and the second connecting surface are respectively located on both sides of the connecting part. The first connecting surface is connected to the circuit board. The positioning part has a receiving groove, which is recessed from the first surface into the interior of the positioning part; the second connecting surface is located in the receiving groove, and the first connecting surface is located outside the receiving groove.

5. The sensor as described in claim 3, characterized in that: The housing has a second cavity that communicates with the outside of the sensor, and the first end is at least partially located in the second cavity; The positioning part includes a second surface, which is located on the periphery of the second cavity; The positioning part has a positioning groove, which is formed by recessing from the second face into the interior of the positioning part. The positioning groove communicates with the second cavity, and the second end is at least partially located in the positioning groove.

6. The sensor as described in claim 5, characterized in that: Along the height direction of the sensor, the first surface and the second surface are respectively located on both sides of the positioning part; the extension direction of the first end and the extension direction of the second end are both parallel to the height direction of the sensor; Along the height direction of the sensor, at least a portion of the first end and at least a portion of the second end are both located away from the circuit board relative to the connection portion; The first end has a first end, and the second end has a second end; the first end is located in the second cavity, and the second end is located in the positioning groove.

7. The sensor as described in claim 1, characterized in that: The first end portion includes the first end portion; along the height direction of the sensor, the first end portion extends outward from the first body portion; The second end portion includes a second body portion and a second end portion. The second body portion is connected to the connecting portion, and the second end portion includes a second end portion. Along the height direction of the sensor, the second end portion extends outward from the second body portion, and the second body portion protrudes from the second end portion.

8. The sensor as described in claim 7, characterized in that: The housing includes a positioning portion, wherein at least a portion of the first end and at least a portion of the second end are both embedded in the positioning portion; The positioning part includes a first hole and a second hole; the first hole includes a first hole and a first hole wall, the first hole wall being located around the first hole; the second hole includes a second hole and a second hole wall, the second hole wall being located around the second hole. The first body portion is at least partially located in the first hole, and the first body portion is sealed to the wall of the first hole; the second body portion is at least partially located in the second hole, and the second body portion is sealed to the wall of the second hole.

9. The sensor according to any one of claims 1 to 8, characterized in that: The sensor includes at least two connection terminals, including a first connection terminal and a second connection terminal, wherein the second end of the first connection terminal is located away from the second connection terminal relative to the first end of the first connection terminal.

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